Energy Flashcards
Unit of energy
Joules
Energy
Is the ability to do work
Potential energy
Stored energy waiting to do work such as a coiled spring or elastic band
Kinetic energy
The energy that moving things have e.g a windmill or a car moving
Heat energy
Heat energy is energy because it can cause things to move e.g hot air causes a hot air ballon to rise and heat in a steam engine can cause a train to move!
Light energy
Can move things in a crookes radiomometer or in a solar powered calculator,plants use light energy to make food.
Sound energy
If you put your head near a loudspeaker you can feel that air is being moved by sound energy.
Electrical energy
This energy can make things like a extractor fans move.it is the flow of electrons around a circuit.
Chemical energy
This is a type of energy stored in fuels such as coal and oil, it is also stored in the food we eat and in batteries .
Nuclear energy
This energy is stored In the nucleus of atoms, the energy that comes from the sun.
The law of conservation of energy
Energy can not be created or destroyed it can only be changed (converted) form one form to another.
Circuit
A circuit is made up of a battery,some wires and different types of equipment and can be used to observe energy conversions.
Renewable energy
Renewable energy sources are constantly being replaced by nature.
Renewable energy sources
- Solar energy |5.biomass energy(use plants to make fuel)
- Hydro electric |6.geothermal energy(metal under your house)
- Wind energy
- wave energy
Advantages of renewable energy
Renewable energy does not cause pollution.
They will not run out.
They are fairly safe to use.
Disadvantages of renewable energy
They are expensive to develop.
More research needs to be done into how to make them good sources of energy.
Non renewable energy
Can not be replaced and will run out.
Non renewable energy sources
Fossil fuels (oil,coal,gas,peat).
Fossil fuels
Oil,coal,natural gas and turf are all examples of fossil fuels .
Disadvantage of fossil fuels
Hey cause pollution and damage the atmosphere.
The sun is a source of all our energy
Heats the ocean and air creating win and currents also allows plants to make food.
Nuclear energy
When the nucleus of an atom is split large amounts of energy are released from it.
Advantages of nuclear energy
It can kill cancer cells,sterilise food,produce electricity,it will not run out like fossil fuels.
Disadvantages of nuclear energy
Waste products are harmful (radioactive energy).
Waste products last for a very long time.
If the nuclear energy gets out of control huge explosions may happen.
